[mkempe]

I was also wondering. The reason is that he left Sweden and apparently moved around quite a bit. He is reported to have been residing mostly in Berlin and his girl-friend lived in Gdansk, Poland.

[edit: addition] The reports are ambiguous; it sounds like what they mean is: the Swedish police collaborated with the Polish police to track him down.

Source (in Swedish): http://www.expressen.se/kvallsposten/pirate-bay-grundaren-gr...

[joshz]

That's most likely what happened. Search and Identification branch of the Crime Bureau (?) worked with Sweden in the past - these guys http://www.policja.pl/pol/kgp/biuro-sluzby-kryminaln/bsk-str....